The ACT State Emergency Service (ACTSES) has now received a total of 520 calls for help since 3pm Tuesday.
ACTSES volunteer crews continued to work overnight responding to jobs with assistance from ACT Fire & Rescue and the ACT Rural Service.
There are currently 131 calls outstanding.
Flood water at Oaks Estate started receding just before midnight.
A severe weather warning for flash flooding in the ACT was reissued by the Bureau of Meteorolgy at 0420.
The ACTSES will again make contact this morning with the people isolated south of Tharwa to check on their welfare.
Anyone requiring emergency flood help can call the ACTSES on 132 500.